Method of purifying .alpha.-substituted acetic acids

Details Method of purifying .alpha.-substituted acetic acids Method of purifying .alpha.-substituted acetic acids

1989-05-31

1990-11-13

Killos, Paul J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

562426, 562427, 562466, 562478, 562490, 562492, 562494, 562485, C07C 5976

Patent

active

049703366

ABSTRACT:
This invention relates to methods of preparing and purifying .alpha.-substituted acetic acids, which comprise treating an .alpha.aromatic-substituted acetic acid represented by a specific general formula with a weak alkali while shielding light, or subjecting an .alpha.-aromatic-substituted acetonitrile represented by a specific general formula to acid hydrolysis, followed by treatment with a weak alkali while shielding light; and treating the alkali salt of .alpha.-substituted acetic acid thus formed with a decolorizing agent.

REFERENCES:
patent: 3873613 (1975-03-01), Knobloch
patent: 4201870 (1980-05-01), Zupancic
patent: 4709089 (1987-11-01), Shimuzu

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